use i2c variable instead of board.I2C()

Author: FoamyGuy

examples/nunchuk_simpletest.py

@@ -7,7 +7,7 @@
 
 i2c = board.I2C()  # uses board.SCL and board.SDA
 # i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
-nc = adafruit_nunchuk.Nunchuk(board.I2C())
+nc = adafruit_nunchuk.Nunchuk(i2c)
 
 while True:
     x, y = nc.joystick